001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.procedure2; 019 020import org.apache.hadoop.hbase.procedure2.util.StringUtils; 021import org.apache.hadoop.hbase.util.EnvironmentEdgeManager; 022import org.apache.yetus.audience.InterfaceAudience; 023import org.slf4j.Logger; 024import org.slf4j.LoggerFactory; 025 026@InterfaceAudience.Private 027abstract class StoppableThread extends Thread { 028 029 private static final Logger LOG = LoggerFactory.getLogger(StoppableThread.class); 030 031 public StoppableThread(final ThreadGroup group, final String name) { 032 super(group, name); 033 } 034 035 public abstract void sendStopSignal(); 036 037 public void awaitTermination() { 038 try { 039 final long startTime = EnvironmentEdgeManager.currentTime(); 040 for (int i = 0; isAlive(); ++i) { 041 sendStopSignal(); 042 join(250); 043 // Log every two seconds; send interrupt too. 044 if (i > 0 && (i % 8) == 0) { 045 LOG.warn("Waiting termination of thread {}, {}; sending interrupt", getName(), 046 StringUtils.humanTimeDiff(EnvironmentEdgeManager.currentTime() - startTime)); 047 interrupt(); 048 } 049 } 050 } catch (InterruptedException e) { 051 LOG.warn("{} join wait got interrupted", getName(), e); 052 } 053 } 054}